Why we can only perceive 3 dimensionsBut time can be another dimension. It can flow fast or slow. That means, we pacmans can move on a paper that is elastic so some parts of paper will be harder to travel while some parts are quicker. (stretched parts will be slow to travel on, compressed parts will be fast to travel on) Also if you stretch the paper on X dimension, only X-travel will be slow eror faster than before.

Dec11

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Why we can only perceive 3 dimensionsLets assume we are pacmans on a paper. We see only two dimensions (like X and y). Z is unreachable. If you could tear the paper and glue it to another paper, we pacmans could travel to that another paper (another dimension, Z=Z+1 => new paper => new universe)

Magnetic Levitation For Space TravelInject nano-particles encapsulated with a body-friendly layer of gel layer. Choose ferro-magnetic nano-particles so when enough are in body, an external magnetic field can apply nearly-uniform force to all body. Not just surface. All volume (except brain, the gel should not stick to brain tissue, but all other tissues especially bones.) Note: dont try at home.